(function(doc, win) {
    var docEl = doc.documentElement,
    resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
      recalc = function() {
          var clientWidth = docEl.clientWidth;
          if(!clientWidth) return;
               if(clientWidth >= 1024) {
                      docEl.style.fontSize = '100px';
               } else {
                 docEl.style.fontSize = 100 * (clientWidth / 375) + 'px';
               }
          };
        if(!doc.addEventListener) return;
        win.addEventListener(resizeEvt, recalc, false);
        doc.addEventListener('DOMContentLoaded', recalc, false);
    })(document, window);
